Gives me something to work with. For example, I've got three rifles chambered in 44 mag. Each one seems works better with something a little different. Sometimes the loads are just for a different purposes, plinking vs hunting loads. Between revolver and rifle load I've got 15-20 different 44 mag loads on the shelves.
Working up an accuracy load the book goes with me to the range so I know what I'm shooting.
Had to move my gun shop recently, found stuff I reloaded 30 years ago. I'm in the process of shooting up some of the old stuff now just to clean up my inventory, dug out my old books to see what I was shooting.
